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Finding the Fourth Proportional to 622,381.60, 934,263.60 and 385,991.20

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Solution

The fourth proportional to 622,381.60, 934,263.60 and 385,991.20 is: 579,415.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,381.60 : 934,263.60 = 385,991.20 : x
  2. Step 2: Convert to fraction form
    622,381.60/934,263.60 = 385,991.20/x
  3. Step 3: Cross multiply
    622,381.60x = 934,263.60 × 385,991.20
  4. Step 4: Simplify right side
    622,381.60x = 360,617,528,080.32
  5. Step 5: Solve for x
    x = 360,617,528,080.32/622,381.60
  6. Step 6: Final answer
    x = 579,415.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.